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Patented June 14, 1904.

UNITED; STATES PATENT OFFICE.

-BRYAN P. ONEILL, OFALLENTOWN, PENNSYLVANIA.

/TIME GAS-LIGHTER.

SPECIFICATION forming part of Letters Patent No. 762,748, dated June 14,1904.

Application filed August 12, 1993- T 0 all whmn it may concern:

Be it known that I, BRYAN P. ONErLL, a citizen of the United States,residing at Allentown, in the county of Lehigh and State ofPennsylvania, have invented new and useful Improvements in AutomaticTime-Lights, of' which the following is a specification.

This invention relates to automatic timelights, the aim of the inventionbeing to pro-- vide a device which operates automatically to extinguisha light at a predetermined time or after the lapse of an intervalofpredetermined length. The device is so constructed and themechanismthereof so arranged that the mechanism may be set at any time toextinguish the light after the interval determined upon, has elapsed.

The automatic time-lightforming the subject-matter of this invention isespecially de signed with reference tothe needs of photographers for thepurpose of enabling photographic paper when placed behind a negative tobe exposed for any desired length of time, according to the rapidity ofthe paper, the density of the negative, and other conditions. By meansof the construction hereinafter described negatives of different sizesand of different densities or printing qualities may be exposed andgiven the proper time of exposure at one and the same time. Theinvention does away with the necessity of counting or timing by means ofan ordinary watch and enables the photographer to proceed with otherwork after once setting the automatic timing device, as will hereinaftermore fully appear.

With the above and other objects in view the invention consists in thenovel construction, combination, and arrangement of parts, ashereinafter fully described, illustrated, and claimed.

In the accompanying drawings, Figurel is a front elevation of a clock,showing an ordinary clock mechanism, the locking-dog of this invention,and also the spring-catch and main arm-supporting brackets which formparts of this invention, also showing the extra pinion by means of whichthe device is set for giving the required time of exposure. Fig. 2 is asimilar view showingthe toothed wheel and *Fig. 8 is a rear elevation ofthe device.

Serial no. 169,262. (No model.)

the combined pointer and stop arm. Fig. 3 is a similar view showing thefriction-clutch added. Fig. iis a similar view showing theclutch-operated disk and the main light-controlling arm. Fig 5 is asimilar view showing the setting-disk under the position it assumes whensetting the light-controlling arm and clutch-operated disk or trippingdevice. Fig. 6 is a similar view showing the normal position of thesetting-disk. Fig. 7 is a perspective view of the device, showing thealarm mechanism, the gaset, and relation between the valve-stem andlight controlling arm. 7 Fig. 9 is a detail plan view of thelight-controlling arm. Fig. 10 is a perspective view of thefriction-clutch. Fig. 11 is a plan view of the toothed wheel and thecombined pointer and stop arm carried thereby. Fig. 12 is a view inelevation of the tripping-disk looking toward the inner side thereof.Fig. 13 is an inside face view of the setting-disk. Fig. 14: is adiagrammatic plan view illustrating the manner of exposing negatives ofdiiferent densities or printing qualities at one and the same time. Fig.15 is a view in elevation showing the device as applied to and used inclock mechanism 2, of which 3 designates the centrally-located arbor,which carries and controls the movement of the minute-hand, said arbormaking one complete revolution in each hour.

. Mounted by preference upon the exterior of the case 1, which mayproperly be termed the clock-case, is an alarm-bell 4:, in connectionwith which a hammer, hereinafter particularly described, operates.

In carrying out the present invention the arbor 3 is extended to providefor the mounting of the several parts hereinafter described. Theextension of the minute-hand arbor is preferably accomplished by meansof a tube 5, which is slipped over the projecting end of the arbor andsecured thereto by apin or other suitable fastener, whereby the sleeveis caused to rotate with the arbor.

Connected fast to the inner end of the tube or sleeve 5 is afriction-clutch 6, preferably formed of a piece or spring sheet metalprovided with a series of radiating arms which are bent so as to beardirectly and with a yielding pressure against the inner face of atripping-disk 7, which lies directly in front of the clutch. The clutchtherefore rotates with the tube or sleeve 5 and makes one completerevolution every hour.

Located between the frictional clutch and the adjacent frame-plate ofthe clock mechanism is a toothed wheel 8, having sixty teeth, one foreach minute. This wheel is mounted loosely on the minute-arbor and hasconnected therewith an arm 9, which extends radially outward therefromand has its outer extremity beveled or made tapering, so as toconstitute a pointer or indicating-hand, which is adapted to swingthrough the arc of a complete circle and over the exposed face of agraduated annulus or dial 10, having sixty graduations thereon numberedfrom 1 to 60. The arm 9 also constitutes a stop, in conjunction withwhich a pin 11 on the tripping-disk cooperates, said arm serving to stopthe pin, and therefore the disk 7 after the latter has been turned acertain distance, as will hereinafter more clearly appear. The toothedwheel 8 is operated by means of a toothed pinion 12, which meshestherewith and which is mounted on the forward end of a shaft 13, whichpasses through the casing and is provided at the rear with an operatingdevice 14, preferably in the form of a milled wheel or thumb-piece, byturning which the toothed wheel 8 may be revolved any desired distance,so as to bring the extremity of the arm 9 to register with any one ofthe graduations on the dial.

The toothed wheel 8 may be locked at any point of adjustment by means ofa lockingdog 15, preferably in the form of a pin or stud, carried by thecrank-arm 16 on the forward end of the shaft 17, extending to the "rearof the casing, where it is provided with an opcrating-handle 18. Byvibrating said handle 18 in the direction indicated by the arrow in therear elevation the dog or pin is moved out of engagement with the teethof the wheel 8, which allows the pinion 12 to be turned by means of thehead 14: so as to reset the combined pointer and stop arm 9. By themeans described the toothed wheel is not only locked against rotation,but also the arm 9, which is fastened to said wheel; therefore thetripping-disk 7 can only be turned backward until the pin 11 thereofcomes in contact with the stop-arm 9, and it is by this means that theclock mechanism is set to run a certain time before sounding the alarmand operating the light-controlling device hereinafter more particularlydescribed.

19 designates a spring which operates to hold the locking-dog normallyin engagement with the toothed wheel 8.

Located within the casing is a bracket 20, provided with a journal 21,on which is pivotally mounted one end of a light-controlling arm 22.This arm extends across the face of the disk 7 and projects at its freeend through a slot 23 at the side of the case. The free end of this armis screw-threaded to receive an internally-threaded fork 24, which isthus free to turn on the arm and may thus be said to have a swiveledconnection therewith. The fork 24L receives the free or swinging end ofthe stem 25 of the valve 26 of a gas fixture or jet 27, so that as thearm 22 is moved upward and downward the valve 26 is turned so as to shutOH or turn on the gas.

At a point intermediate its ends the main arm 22 is provided with acatch-lip 28, having a beveled face 29 and adapted when lifted to passand be engaged by the lip 30 of a spring-catch 31, which is pivotallymounted on a pin or stud 32, projecting from a bracket 33, mountedwithin the casing, the springcatch being thus adapted to swing to oneside to allow the catch-lip to pass thereby and back again to engagesaid catch, the backward movement of the spring-catch being limited bymeans of the projection or stop 34 on said bracket. 35 represents aspring for normally holding the spring-catch in position to engage thecatch-lip on the main arm 22. Thus as the arm 22 is raised thespring-catch engages the catch-lip on said arm and holds the armelevated until it is released.

In order to release the arm 22, the trippingdisk 7 is provided with atrip or release-catch 36, which is pivotally mounted, preferably, on therear side of said disk and controlled by means of a spring 37 so thatthe point of the release-catch or trip normally projects beyond theouter edge or periphery of said disk. As the tripping-disk turns in aclockwise di rection the release-catch or trip comes in contact with thelip of the spring-catch 31, push ing said lip from beneath the catch-lip28 on the main arm 22, whereupon said arm falls by gravity, rocking thevalve-stem and shutting off the gas or turning the same down low.

The means for setting the several previously-described parts of themechanism consists of whatI terma setting-disk 38, which is providedwith a central sleeve 39, mounted loosely on the tube or sleeve 5. Thedisk is provided upon its outer face with a handle 40, by means of whichit may be turned, and also has represented thereon an arrow 4:1 toindicate the direction in which the disk must be turned. Upon its innerface the disk is provided with a stud 42, which in moving upward engagesbeneath the arm 22 and raises said arm until it is caught and held bythespring 44, which is coiled around the tube and held fast at one end.The spring 44 allows the disk to be turned in the direction indicated bythe arrow, but restores said disk to its initial position as soon as thedisk is released after elevating the arm 22. The disk 38 is alsoprovided upon its outer face with a mark 45, adapted to register withone edge of the combined pointer and stop arm, said mark indicating thelimit of movement which may be given to the setting-disk, andconsequently to the tripping-disk 7, in an anticlockwise direction.

As the arm 22 falls just before reaching the lower limit of itsmovement,it comes in contact with the forwardly projecting andsubstantially horizontal arm 46 of a bell-crank lever 47, mounted uponthe outside of the case 1,said lever being held by means of a spring 48against a stop 49, which maintains the arm 46 in proper position to bestruck by the descending light-controlling arm 22. The other arm on thebell-crank has connected therewith a hammer-arm 50, provided with ahammer 51, which, by the means described, is thrown against the bell 4simultaneously with the turning out or turning down of the gas.

The light-controlling device hereinabove described is preferably used inconnection with a table or other horizontal support 52, which hasrepresented thereon a series of concentric circles 53. The timing deviceis placed on the table or support, so as to bring the gas-jet directlyin the center of the circles, and then the frames containing thenegatives and sensitized'paper are placed along the circles, accordingto the density of the negatives and the difl'erences in the printingqualities of the same. Where the negative is quite dense, it is placedin line with the inner circle and where the negative is quite weak it isplaced at the outer circle, so that in this way the length of exposureis made to suit different negatives while giving the proper exposure toeach.

In order to set the automatic time-light, the locking-dog 15 is swungout of engagement with the toothed wheel, and the latter is then turnedby means of a handle 14 until the combined pointer and stop arm 9 isbrought into line with the graduation representing the number of minutesthe exposure is to continue. The dog is then released, so' as to lockthe toothed wheel 8 and keep the same stationary. The setting-disk isthen turned in the direction indicated by the arrow, so as to raise thearm 22 until it is caught by the spring-catch and also to turn thetripping-disk 7 until the pin 11 contacts with the arm 9. Thesettingdisk is then turned to the right and released, and is carriedback to its initial position by means of the spring which controls saiddisk. As the arbor of the minute-hand revolves it carries with it, bymeans of the friction-clutch, the tripping-disk. As the predeterminedtime elapses the trip on the tripping-disk pushes the spring-catch outof engagement with the catch-lip on the arm 22. Said arm being released,it falls, turning ofi the gas, and at the,

same time striking against the bell-crank lever and sounding the alarm.

It will be understood that the arm 22 may be made to operate an electricswitch instead of a gas-valve where an electric light is employed. Thetiming device may also be used in connection with a coal-oil lamp or alamp supplied with gas, which is not controlled by means of a valve.This may be accomplished, as shown in Fig. 15, by employing a screen 54of any suitable opaque material, carried by an extension 55 of the mainarm 22, the said screen being adapted to be moved by means of said armin front of and away from the light, so as to screen the negatives.

By means of the construction hereinabove described an exposure of anydesired length of time may be obtained, and where the same negative isrepeatedly exposed in order to secure a number of prints exactly thesame amount of exposure may be given each time. The device requires noattention on the part of the photographer after it is once set. As soonas the exposure is complete the light is automatically extinguished orturned down and at the same time the alarm is given to notify thephotographer, who is thus enabled to attend to other duties. It willalso be apparent that any number of negatives of any size and ofdifferent densities may be exposed at one and the same time.

Having thus described the invention, I claim as new 1. The combinationwith clock mechanism, of a tripping-disk mounted on the arbor of theminute-hand, a friction-clutch for causing said disk to normally rotatewith the arbor, a lightcontrolling arm, and a spring-catch arranged inthe path of the tripping-disk and adapted to engage thelight-controlling arm.

2. The combination with clock mechanism,

of a tripping-disk frictionally carried by the arbor of the minute-hand,a light-controlling arm adapted to be tripped and released by saidtripping-disk, a dial, a combined pointer and stop-arm movable over thedial, a toothed wheel for setting said arm, and means for turning andlocking said toothed wheel.

3. The combination with clock mechanism, of a toothed wheel mountedloosely on the arbor of the minute-hand, means for turning said wheel, acombined pointer and stop-arm carried by said wheel, a dial over theface of which said arm moves, a dog for locking said wheel at any point,a tripping-disk having a clutched engagement with said arbor andprovided with a projection adapted to come in contact with the stop-arm,a light-controlling arm adapted to be tripped by said disk, and meansfor turning the disk on the arbor so as to carry the projection thereofinto contact with the stop-arm in setting the device.

4. The combination with clock mechanism, and a dial, of a toothed Wheelloosely mounted on the arbor of the minute-hand, a pinion for settingsaid wheel, a spring-dog for locking said wheel, a combined stop-arm andpointer carried by said wheel and movable over the dial, a tripping-diskhaving a frictional engagement with said arbor and provided with a pinor projection adapted to be moved into contact with the stop-arm, alight-controlling arm adapted to be tripped by said disk, and means forsimultaneously setting the lightcontrolling arm and tripping-disk.

5. The combination with clock mechanism, and a dial, of a rotatablecombined pointer and stop-arm movable over the dial, means for adjustingand locking said arm, a trippingdisk having a frictional engagement withthe arbor of the minute-hand and having a projection adapted to bebrought into contact with the stop-arm, a light-controlling arm, aspring-catch for upholding said arm and adapted to be released by thetripping-disk, and a setting-disk rotatably mounted on said arbor andhaving means for raising the lightcontrolling arm and turning thetrippingdisk in setting the device.

. 6. The combination with clock mechanism, of a combined pointer andstop-arm rotatable around the arbor of the minute-hand, means forsetting and locking said arm, a trippingdisk frictionally mounted onsaid arbor and having a projection movable into'contact with thestop-arm, a light-controlling arm, a springcatch engaging said arm andadapted to be tripped by said disk, a setting-disk rotatably mounted onthe arbor and provided with means for lifting the light-controlling armand setting the tripping-disk, and a spring for restoring thesetting-disk to its normal position'after setting the device.

7 The combination with clock mechanism, of a combined pointer andstop-arm rotatable around the arbor of the minute-hand, a dial overwhich said pointer travels, means for setting and locking said arm, atripping-disk frictionallymounted on said arbor, and adapted to engagethe stop-arm, a light-controlling arm adapted to be tripped by saiddisk, a swivel-fork mounted on the free end of said light-controllingarm, and a light-controlling valve having its stem in engagement withsaid fork.

8. The combination with clock mechanism, of a combined pointer andstop-arm rotatable around the arbor of the minute-hand, means forsetting and locking said arm, a trippingdisk frictionally engaged withsaid arm and adapted to engage the stop-arm, a light-controlling armadapted to be tripped by said disk, and alarm mechanism arranged in thepath of movement of the light-controlling arm so as to be actuatedthereby.

In testimony whereof I affix my signature in presence of two witnesses.

BRYAN P. ONEILL.

Witnesses:

HENRY J. ONEILL, CLARENCE H. WOLF.

